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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal EECCIS JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) International Journal of Smart Grid and Sustainable Energy Technologies JOURNAL OF SCIENCE AND APPLIED ENGINEERING Jurnal Teknologi dan Manajemen Industri Pawon: Jurnal Arsitektur ASAWIKA: Media Sosialisasi Abdimas Widya Karya Indonesian Journal of Electrical Engineering and Computer Science Journal of Sustainable Technology and Applied Science Jurnal Infomanpro SinarFe7 Journal of Advanced Technology and Multidiscipline (JATM) JASTEN (Jurnal Aplikasi Sains Teknologi Nasional Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Magnetika: Jurnal Mahasiswa Teknik Elektro Jurnal JEETech
Abraham Lomi
Institut Teknologi Nasional Malang
Aerospace Engineering Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Social Sciences Transportation Other

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The Frequency Stability Analysis Due to the Integration of 100 MW Solar Power Plant in the 150 kV Power System: A Case Study on the Impact of Large-Scale Solar PV Penetration on Grid Frequency Stability Davis, Vincentius; Abraham Lomi; Irrine Budi Sulistiawati
SinarFe7 Vol. 7 No. 1 (2025): SinarFe7-7 2025
Publisher : FORTEI Regional VII Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study analyzes the impact of integrating a 100 MW Solar Power Plant (PLTS) (4×25 MW) on the frequency stability of the power system in the 150 kV transmission network in Bali. Simulations were conducted using DIgSILENT PowerFactory software employing Load Flow and RMS Simulation methods, covering disturbance scenarios such as load increases up to 60%, generator outages (Gilimanuk and Pemaron), and the effect of system protection settings. Results show that without proper protection settings, the integration of PLTS leads to a frequency drop below the minimum threshold (47.76 Hz) and a high Rate of Change of Frequency (ROCOF) (-1.21 Hz/s), which poses a risk of system disconnection. After configuring protective relays (underfrequency, undervoltage, and df/dt), the system stability improved; frequency was maintained within the 48–52 Hz range, and ROCOF decreased below -0.5 Hz/s. Therefore, large-scale PLTS integration can be safely implemented without compromising system stability, provided that appropriate protection configurations are in place. This research supports the implementation of clean energy in Bali and serves as a reference for integrating renewable energy sources into existing power systems.
OPTIMIZATION OF LIGHTING DESIGN IN OFFICE SPACES WITHIN THE FRAMEWORK OF ENERGY CONSERVATION Ainun Zakiyah; Lomi, Abraham; Handoko, Fourry
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 6 No. 2 (2025): Journal of Sustainable Technology and Applied Science, November 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v6i2.9411

Abstract

Lighting conditions in office building B of UNISMA have not met the SNI standard because each room has the same number of lights for different rooms; this results in a large amount of electricity consumption from the lighting sector. The installation of the number of lamp armatures should be in accordance with the area of ​​the room and then related to the function of the room and must also meet the standard lighting of the room (SNI 03 – 6575 – 2011.2011). For that, the calculation of the number of lamp armatures is appropriate for the standard and design of room lighting using Dialux software, where the office lighting standard is 350 Lux. Based on these steps, the lighting standard is produced approaching the SNI standard using Philips LED lights. With this design condition, the use of electrical energy becomes optimum and energy efficiency is achieved. Based on the Dialux software simulation, the percentage of savings in the initial conditions and design was 39%:61%.
Seven-Level PUC Inverter for Photovoltaic Systems with Buck-Boost Converter and P&O MPPT using Theta-Based Modulation (TMIM) Al-Hajj, Baligh Belal Yahya Mohammed; Rini Nur Hasanah; Abraham Lomi
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 19 No. 3 (2025)
Publisher : Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jeeccis.v19i3.1837

Abstract

This paper shows the design and simulation of a photovoltaic (PV) power conversion system based on a Seven-Level Packed U-Cell (PUC) inverter interfaced with a Theta-Based Modulation method and a Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm. The designed architecture focuses on overcoming significant challenges in PV systems, namely intermittent solar radiance, unstable voltage, and distortion of harmonics. Optimized by theta-based modulation for minimizing switching loss and overall harmonic distortion (THD), the PUC inverter topology stands out for its minimum number of components and superior output quality. A buck-boost converter controlled by the P&O MPPT algorithm is used for obtaining a maximum amount of energy from the PV array. Simulation on MATLAB/Simulink shows substantial performance improvements in terms of voltage stability, power quality, and energy efficiency under changing environmental conditions. The system integrated with the designed architecture proves a cost-effective and reliable method for improving the performance of PV systems and facilitating grid interface.
Implementasi Metode Artificial Bee Colony Untuk Penempatan Distributed Generator Pada Penyulang Rayon Tanjung Rahmat Hidayat; Abraham Lomi; Irrine Budi Sulistiawati
Jurnal JEETech Vol. 5 No. 2 (2024): Nomor 2 November
Publisher : Universitas Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32492/jeetech.v5i2.5202

Abstract

Distributed Generation (DG) is a power plant that is spread over the power distribution network. In principle, electrical power output is generated by power plants located far from the load center and electrical power is transmitted to the load center through transmission and distribution networks. The longer the cable from the power plant or substation, the lower the voltage at the end load. Sub-optimal DG placement and size can result in increased power losses and affect the system voltage profile. In addition, suboptimal generation capacity can lead to voltage instability, reduced system security, and potential impacts on system frequency and emissions. Therefore, this study will use the Artificial Bee Colony (ABC) method to determine the optimal DG capacity and location. In the base case condition, the power losses in the system are 118 KW and 99 Kvar. Power losses after the installation of 1 DG active power loss becomes 37.4 KW and reactive power loss becomes 31.65 Kvar. Placement of 2 DGs reduces active power loss to 17 KW and reactive power loss to 15 Kvar. While the placement of 3 DG reduces active power loss to 33 KW and reactive power loss to 28 KVar.
Co-Authors Abdul Hamid Abdurrohman Eko Saputra Adlan Bagus Pradana Agung Bagus Putranto Ainun Zakiyah Ainun Zakiyah Akanksha Priya Al-Hajj, Baligh Belal Yahya Mohammed Alfarid Hendro Yuwono Angga Budi Prastyo Anto Nugroho Apolonio Nuncio Fernandes de Castro Ardyono Priyadi Arfan Natan Palumpun Aryuanto Soetedjo Aventus Wagur Awan Awan awan krismanto Awan Uji Krismanto Bambang Prio Hartono Bayu Jaya PUSPITA Cahyo Edi Wicaksono Choirul Saleh Davis, Vincentius Deva Herdiyanto Putra Dhadbanjan Thukaram Dhayal Gustopo Dhilah Danumerta Subeki Dipu Sarkar Diran kurniawan Eding Iskak Imananto Efendi, Khorul Fahmi EKO NURCAHYO Eko Yohanes Setyawan Ella Levana Puspanegara Ellysa Nursanti Endah Kusuma Rastini Fandi Juli Wirawan Farhan Farhan Firmansyah M Fourry Handoko Fuad Hasan Gustopo, Dayal Hadi Suyono Hadi Suyono Hadi Suyono Hafizhul Ayyasi Khairullah Herlambang Setiadi Heru Purbo Waseso Heru Purbo Waseso Hunip Setio I Made Wartana Ida Soewarni Ikhwan Romadhoni Irenetta Boru Silalahi Irrine Budi Sulistiawati Jeremias Lazaros Da Silva Neves Jimmy Jimmy Julianus Hutabarat Ketut Agung Agus Jaya Kukuh Maulana Arhami Kustamar Longginus L. Do Nacimento Luh Putu Ratna Sundari M, Firmansyah Maranatha Wijayaningtyas Maria Istiqoma Maulana Bayhaqi Maxi Dwi Atmanto Moch Fahrulrozi Mokh Suseno Aji Sari Muhammad Abdillah Muhammad Davi Labib, Radimas Putra Muhammad Iqbal Muljanto, Widodo Pudji Ni Putu Agustini Nusa Sebayang Palumpun, Arfan Natan Puspita, Bayu Jaya Putri Zulianti Rachmad Albi Igam Rachmad Rahmat Hidayat Rahmat Hidayat Rini Nur Hasanah risky.a.f, Risky Rusilawati Rusilawati Silvester Sari Sai Soeparno Djiwo Sri Renaningsih Subandiyah Aziz Sujit Pani Suyono, Hadi Taufik Rahim Taufik Rahim, Taufik Togi H Nainggolan Widodo Pudji Muljanto Wingki Albet Yohanes Latumahina Yusuf Ismail Nakhoda Yusuf Ismail Nakhoda Zailani, Putri Zakiyah, Ainun